Diamond Bar High
High SchoolSchool overview
College & career readiness
Data source: California Department of Education — ACGR, CCI, CGR reports
Dashboard indicators
Data source: California School Dashboard 2025, ELPAC 2024
Student demographics
Performance breakdown
| Category | Percentage |
|---|---|
| Exceeded Standard | 46.3% |
| Met Standard | 26.0% |
| Below Standard | 27.7% |
What other rankings don't show you
Most rating sites report "72% proficient" for Diamond Bar High and stop there. Here's what that number hides:
46.3% of students exceeded standard while 26.0% merely met it. That exceeded rate is 30.8 points above the state average of 15.5%. That's 2.8 points below the Walnut Valley Unified district average of 49.0%. Nearby schools (within ~3 miles) average 47.0% exceeded — about the same. The gap between "met" and "exceeded" is the difference between a school that clears the bar and one that raises it.
The graduation rate is 95.8% — above the state target. 68.4% of students complete A-G requirements for UC/CSU eligibility — a strong college readiness signal. 93.2% of graduates go on to college within a year.
Chronic absenteeism is 10.3%, better than the state average of 34.0%.
Key metrics
ELA scores by grade
| Grade | Tested | Exceeded | Met | Met+Above |
|---|---|---|---|---|
| 11th | 625 | 48.5% | 27.8% | 76.3% |
Math scores by grade
| Grade | Tested | Exceeded | Met | Met+Above |
|---|---|---|---|---|
| 11th | 622 | 44.0% | 24.3% | 68.3% |
K-12 Feeder PathBoundary data
Feeder patterns derived from 2015-16 NCES attendance boundary data. Boundaries may have changed. Contact your school district for current information.
Nearby schools
Nearby Elementary Schools
10 within ~3 mi · avg 64.0
Nearby Middle Schools
2 within ~3 mi · avg 72.9
Data source: California Department of Education (2025 test year) · How we score